FRS lost substantial power and exhaust quieter? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

pimmorg · 06-20-2020, 09:59 PM

Hi all,

I was driving today and noticed my supercharged frs had a huge lack of power and later that day i noticed a significantly quiter/different exhaust tone on accerleration. It is so odd. I went under the car today to check for header leaks/exhuast leaks and couldnt find any.

Any ideas on what might cause this???

-c38 supercharger
-JDL UEL catted headers
-custom catback with muflers and resonator

DarkPira7e · 06-20-2020, 11:22 PM

Sounds like the catalyst could be coming apart. Check and make sure it's not lodged in your exhaust somewhere! This could cause SERIOUS damage

pimmorg · 06-21-2020, 12:12 AM

That's what i was thinking. Ill go ahead and do this ASAP.

DO you think its ok to just rip out the cat and run it that way? Or should i invest in a new set of headers?

DarkPira7e · 06-21-2020, 11:17 AM

Quote:

Originally Posted by pimmorg

That's what i was thinking. Ill go ahead and do this ASAP.

DO you think its ok to just rip out the cat and run it that way? Or should i invest in a new set of headers?

How old are the headers? I'd try to get a replacement through warranty. If there's not something forcing you to use chatted headers, I'd get a catless style and just have a cat in the frontpipe

solidsnake11 · 06-21-2020, 09:55 PM

Quote:

Originally Posted by pimmorg

That's what i was thinking. Ill go ahead and do this ASAP.

DO you think its ok to just rip out the cat and run it that way? Or should i invest in a new set of headers?

Works great on track. Shhh

pimmorg · 06-22-2020, 01:34 PM

Abosolutely nothing holding me back from catless. Bought the headers used on a great deal... now i think i know why it was a good deal.

BigTuna · 06-22-2020, 02:17 PM

Are you still making boost? Is it a boost leak?

pimmorg · 06-22-2020, 02:57 PM

I dont have a boost gauge but it feels like it makes boost still. Way underpowered all around though.

pimmorg · 06-22-2020, 05:19 PM

Just talked to my tuner and the boost is actually way low. Only 3-4 lbs at peak. Hot intake temperatures too which may be a combination of headers and driving in 110 plus degrees.

DarkPira7e · 06-22-2020, 05:44 PM

Quote:

Originally Posted by pimmorg

Just talked to my tuner and the boost is actually way low. Only 3-4 lbs at peak. Hot intake temperatures too which may be a combination of headers and driving in 110 plus degrees.

This may be great news. Now I'd be spray testing every hose clamp on your air intake to see where it's leaking, you shouldn't be down that much, High temps or not, the amount of boost won't change, just its potency as it gets heat soaked

Spuds · 06-22-2020, 05:46 PM

Quote:

Originally Posted by pimmorg

Just talked to my tuner and the boost is actually way low. Only 3-4 lbs at peak. Hot intake temperatures too which may be a combination of headers and driving in 110 plus degrees.

At the risk of stating the obvious, it sounds like something is wrong with the supercharger then? Belt slipping? Maybe some sort of down stream leak?

How old is the supercharger?

pimmorg · 06-23-2020, 02:31 PM

SUpercharger is 2.5 yrs old. still under warranty.

I just went into exhuast and found issue. Primary cat exploded and was completely jam packed into the secondary cat. Im surprised the car even turned on lol. I ripped out both cats and the car seems perfect now (just a bit loud).

Thanks everyone!

06-20-2020, 09:59 PM	#1
pimmorg Member Join Date: May 2020 Drives: 2013 frs w/ supercharger Location: AZ Posts: 15 Thanks: 0 Thanked 6 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	FRS lost substantial power and exhaust quieter? Hi all, I was driving today and noticed my supercharged frs had a huge lack of power and later that day i noticed a significantly quiter/different exhaust tone on accerleration. It is so odd. I went under the car today to check for header leaks/exhuast leaks and couldnt find any. Any ideas on what might cause this??? -c38 supercharger -JDL UEL catted headers -custom catback with muflers and resonator

06-22-2020, 02:17 PM	#7
BigTuna Senior Member Join Date: Jun 2015 Drives: 2013 WRB BRZ Location: Ohio Posts: 672 Thanks: 258 Thanked 477 Times in 275 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Are you still making boost? Is it a boost leak? __________________ 2013 WRB "Build" Thread

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06-20-2020, 11:22 PM	#2
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 4,064 Thanks: 3,323 Thanked 4,210 Times in 2,116 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	Sounds like the catalyst could be coming apart. Check and make sure it's not lodged in your exhaust somewhere! This could cause SERIOUS damage

06-21-2020, 12:12 AM	#3
pimmorg Member Join Date: May 2020 Drives: 2013 frs w/ supercharger Location: AZ Posts: 15 Thanks: 0 Thanked 6 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	That's what i was thinking. Ill go ahead and do this ASAP. DO you think its ok to just rip out the cat and run it that way? Or should i invest in a new set of headers?

06-22-2020, 01:34 PM	#6
pimmorg Member Join Date: May 2020 Drives: 2013 frs w/ supercharger Location: AZ Posts: 15 Thanks: 0 Thanked 6 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Abosolutely nothing holding me back from catless. Bought the headers used on a great deal... now i think i know why it was a good deal.

06-22-2020, 02:57 PM	#8
pimmorg Member Join Date: May 2020 Drives: 2013 frs w/ supercharger Location: AZ Posts: 15 Thanks: 0 Thanked 6 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I dont have a boost gauge but it feels like it makes boost still. Way underpowered all around though.

06-22-2020, 05:19 PM	#9
pimmorg Member Join Date: May 2020 Drives: 2013 frs w/ supercharger Location: AZ Posts: 15 Thanks: 0 Thanked 6 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Just talked to my tuner and the boost is actually way low. Only 3-4 lbs at peak. Hot intake temperatures too which may be a combination of headers and driving in 110 plus degrees.

06-23-2020, 02:31 PM	#12
pimmorg Member Join Date: May 2020 Drives: 2013 frs w/ supercharger Location: AZ Posts: 15 Thanks: 0 Thanked 6 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	SUpercharger is 2.5 yrs old. still under warranty. I just went into exhuast and found issue. Primary cat exploded and was completely jam packed into the secondary cat. Im surprised the car even turned on lol. I ripped out both cats and the car seems perfect now (just a bit loud). Thanks everyone!

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